Improvement in addino-machote



2 Sheets-Sheet 1.

Gx, W. OHAPIN. ADDNG MACHINE.

N0. 99,533. Patented Feb. 8, 1870.

2 Sheets-Sheet 2. G. W. GHAPIN.

ADDING MACHINE. No. 99,533.

.Patented Feb. 8,1870.

lhrird gisten @nicht (dimite.

GILBERT W. GHP-IN, OE BROOKLYN,'NEW YORK.

Letters Patent No. 99,533, dated February 8, 1870.

DIPROVEMENT IN ADDING-MACHINE.

The Schedule referred to in than Letten atexxt alud pu. o! the lame.

Tc all whom it may concern Be it known that I, Grnsnn'r W. CHAPrN, of Brook-A lyn, in the county of Kings, and State of New York, have invented a new and improved Adding-Machine; and I do hereby declare that the following is a full, clear,

and exact description thereof, which will enable others and convenient adding-machine, designed'more Aparticularly for hook-keepers use, and which willenable them tol add columns oi' figures with quickness and accuracy; and it consists in the construction and com- )nation of various parts of the machine, as hereinafter more fully described.

A represents the bed-plate of the machine, to which are attached the lower ends of the standards B C, `that support the various opemting'lparts of the machine. I) is a vertical plate, the ends of which are secured the posts or standards B, and the forward side of' which is grooved, with a series of eighteen dovetailed grooves, inwhich worlith'e vertical sliding hars E.

To the lower parts of thc sliding bars E are pivoted the lower ends of the'iatchet-ia-is F, which are held forward by the springs G, which are attached to the sliding bars E, and press against the ratchet-bars F.

'lhe upper ends of thelsliding bars E are bent forward, or have'stops formed upon or attadied to them, to receive the upper ends'of the ratchet-hars F, and prevent them from being pushed too far forward.

Beginning at the lett hand of the machine, the first two of tl1e'ratohetbars F haveeach one tooth, the second two have each two teeth, and sol on to the ninth two, which have nine teeth each.

To the lower ends of 'the sliding bars E are pivoted the inner ends of thelevcrs H, which are pivoted to supports I, attached to the bed-plate A, andto the outer ends of which are attached keys J K. l Thekeys J K of the leversHgare arranged in two rows, as shown iniigs..1 'and 2, and are attached :ilternately to the said levers H,^as shown in fig. l; a key, J, of the outer -rowrheingattached to the leftuand one, and a'key, ofthe inner row, to the righthand one of the lever'll of each pair of the sliding` cnrs E,

The outer keys J are the units keys, and the inner :cys are the tens keys.

'-'The inner keys K are made high, as shown in iig. 2, so that they may be conveniently operated without disturbing the levers of the outer keys upon each side of the inner keys being operated. The levers' H, and with them the sliding bars E and the ratchet-bars F, are brought back to their places, after being operated, hy springs L, connected with said levers H. The springs L -inay be made of rubber or metal,

and may be connected with the inner ends of the le:

vers H', as shown in figs. 1' and 2, and arranged to down thejinner ends of the levers; or they may Vlbe. :'connnoted with' theouter ends of lthe levers, and

arranged toraiso said outer end sJas may be' desired.

'Maud Nere two shafts, placed one above the 'other-' Cand revolving in bearings attached to the posts or standards B.

To the shafts M and 'N are attached ratchet-wheels O and P, in such positions that the ratchet-wheels O,

attached to the lowersha;v M, may be acted upon by .the yratchetioars F, with which the outer or units keys J are connected, andfso that the ratchet-wheels P, attached to thenppershalt' N, may be acted-upon by the ratchet-bars-F, with which the inner or tens keys are connected.

Q. are rods orbarspassing through and sliding longitudinally' in holes iur'the upper parts of the posts or standards C. A i

'R are parallel'rodsorhars, the ends of which'are connected with the'rods or bars Q, the rods or bars Q and, R thus forming a' fraine,' that may be moved toward or from th'e-ratchet-brs F, by sliding the rods or bars Q forward .or b'aclrl in the posts or standards C.

The flame Q R sh'eld forwardbyithe coiled springs S, placed upon the rods- Q, the rear ends of which rest against therear posts O, and the forward ends of lwhich rest against the ends of thepforward rod R, or

against other stops attached to the said rods Q. T is a frame', through holes in the end'bars of which this rods or bars R pass,.'so that the said frame T, and its attachments, may be moved .back and forth upon the said hars or rods R, 'as may be desired.

'in bearings in the'forward ends f the end bars of -the frame T, revolves shaft, U, upon which is placed a series f four or more 'register-wheels, V, upon the faces of each o fwllich 'are placed the nine digits and cipher in theirnaturl'order.

WA are gear-wheels, placed upon the shaft U, at the side of the register-wheelsV,`and.connected with said registexwheels V by a-pawl and ratchet, so that when the said gear-wheels are turned forward, they may carry the said regimen-.wheels with them, and so that the said register-wheels -may' be turned, when ncces- "sary, to adjust them to the zero-mark, without moving the said gear-wheels.l

. With each of the gear-wheels W, except the rightforced down, to cause the vpawls Y to act upon the ratchet-wheels X.

The spring-frames or arms Z are forced down by a pin or single tooth, B', formed upon or attached'to the left-hand side ofthe register-wheels, except the lel1-hand one, and which acts upon a'single tooth or pin, C', attached to the springvframes or arms Z, the pins or teeth B' being so arranged as to' operate and thus move the next register-wheel one space, whenever the registerwheel with which it is connected is passing from the nine-space to the zero-space, in order to carry the teus. D' and E' are gearewheels, attached to the shafts M and N respectively, in such positions as to mesh into two adjacent gear-wheels W of the register-wheels V, so that the said register-wheels may be revolved by the revolution of said shafts.

To the left-hand sides of -tbe register-wheels are at- I tached spring-pawlsF, which rest upon single-toothed ratchet-wheels G', attached to the shaft U, so that by revolving the said shaft in the proper direct-ion, the register-wheels may all, at the same time, be revolved to the zero-mark, ready to be again used.

The shaft U may be revolved to bring the registerwheels to the zero-'mark by a sliding rack-barH', working in supports attached to the frame T, and the teeth of which mesh into the teethof 'a small gearwheel, I', attached to the end of the shaft U.

. The sliding rack-bar H' may be opemted by a lever,

J', or by other convenient means.

K' are hook-plates, the lower ends of which are pivoted to the hed-plate A, and which extend up between the levers H.

The.hookplates .K nave hooks or shoulders formed upon their forward edges, which, when the said hook-` plates are forced forward, catch upon pins'L', attached to the units levers H. v I

The rear edges of the hook-plates K' are made inclinedi or curved, as shown in fig. 2,` and the said hookplates are forced forward by pins M', attached to the tens lever H. By this device,l the units lever H will be locked by the movement ofthe tens levers, so that it will be,irnpossible to move the said units levers ao- Y cidentally when operating the said tens levers.

Ii desired, the vertical grooved plate D may be slotted, and the-units and tens keys be connected with the sliding spring-ratchet' hars E F G though said slot, so that the said sliding spring-ratchet liars E F G may be operated directly by downward pressure, applied to said keys without the interposition of levers; but in this case, the teeth ofthe ratchet-wheels O P must be reversed, and -also the order of the numerals upon the register-wheels V, as the said wheels will necessaiily revolve in the 'opposite direction.

In using the machine, the units or the tens may be added first, or the units and, tensmay be added alter# nately, as may be desired. 1

When the units and tens .have been added, the slidving frame T, and'its attachments are drawn back,

and moved laterally, so as to bring the gear-wheels of the hundreds and-thousands register-.wheels into gear with the gear-wheelsof the shas M and N. The hundreds and thousands are then added in the same manner as the units and tens were added, the -units and tens regimen-.wheels remaining stationary, and showing the units and .tens of the amount. Tens of thousands and hundreds of thousands may then be added in the same manner; andso o'n, as far as the number of register-wheels extend.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patent- 1. Theregister-wheels V, provided with g -wheels W, ratchet-wheels X, pawls Y, spring-arms or frames Z, and single teeth o r pins B' 0', in combination with the`adj ustable sliding frames T and B Q, substantially as herein shown and described. and for the purposes set forth.

2. The two shafts M N, placed one above the other, and provided with ratchet -wheels OP and gear-wheels D' E',inv combination with the gear-wheels W of the register-wheels V,"substantially as herein shown and desclibed, and for'the purpose set forth. A

3. The sliding springJratchet bals E F G, in comg bination with the vertical grooved plate D, andwith the ratchet-wheels 'O P, attached to the shalts M N, substantially as hereln shown and desribed, and for the purpose set forth.

4. A' series of alternate long and short levers, with spring-keys attached thereto, when operated by the means specified.-

5. The combination of the pivoted lock-plates K'and pins L' M', with the units and tenslevers H, substantially as herein shown and described, and for the purpose set forth.

6. The combination of the pani, single-toothed ratchet-wheel G', gear-wheel I', and sliding rack-bar H', with the register-wheels V, shaft U, and adjustable sliding frame T, substantially as herein shown and described, and for the purpose set forth.

The above specilication'of my invention signed by me, this 20th day'of July, 1869.

. GILBERT W. GHAPIN.

Witnesses:

Geo. W. Manne, E. Tarn. 

